namespace ConstructSignature {
    declare function foo1(cb: new (x: number) => void): typeof cb;
    declare function foo1(cb: any): any;
    var rarg1: new (x: number) => number;
    var r = foo1(rarg1); // ok because base returns void
    var rarg2: new <T>(x: T) => string;
    var r2 = foo1(rarg2); // ok because base returns void

    declare function foo2(cb: new (x: number, y: number) => void): typeof cb;
    declare function foo2(cb: any): any;
    var r3arg1: new (x: number, y: number) => number;
    var r3 = foo2(r3arg1); // ok because base returns void
    var r4arg1: new <T>(x: T) => string;
    var r4 = foo2(r4arg1); // ok because base returns void
}